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[ffmpeg] / libavcodec / h264_picture.c
1 /*
2  * H.26L/H.264/AVC/JVT/14496-10/... decoder
3  * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21
22 /**
23  * @file
24  * H.264 / AVC / MPEG-4 part10 codec.
25  * @author Michael Niedermayer <michaelni@gmx.at>
26  */
27
28 #include "libavutil/avassert.h"
29 #include "libavutil/imgutils.h"
30 #include "internal.h"
31 #include "cabac.h"
32 #include "cabac_functions.h"
33 #include "error_resilience.h"
34 #include "avcodec.h"
35 #include "h264dec.h"
36 #include "h264data.h"
37 #include "h264chroma.h"
38 #include "h264_mvpred.h"
39 #include "mathops.h"
40 #include "mpegutils.h"
41 #include "rectangle.h"
42 #include "thread.h"
43
44 void ff_h264_unref_picture(H264Context *h, H264Picture *pic)
45 {
46     int off = offsetof(H264Picture, tf) + sizeof(pic->tf);
47     int i;
48
49     if (!pic->f || !pic->f->buf[0])
50         return;
51
52     ff_thread_release_buffer(h->avctx, &pic->tf);
53     av_buffer_unref(&pic->hwaccel_priv_buf);
54
55     av_buffer_unref(&pic->qscale_table_buf);
56     av_buffer_unref(&pic->mb_type_buf);
57     av_buffer_unref(&pic->pps_buf);
58     for (i = 0; i < 2; i++) {
59         av_buffer_unref(&pic->motion_val_buf[i]);
60         av_buffer_unref(&pic->ref_index_buf[i]);
61     }
62
63     memset((uint8_t*)pic + off, 0, sizeof(*pic) - off);
64 }
65
66 int ff_h264_ref_picture(H264Context *h, H264Picture *dst, H264Picture *src)
67 {
68     int ret, i;
69
70     av_assert0(!dst->f->buf[0]);
71     av_assert0(src->f->buf[0]);
72     av_assert0(src->tf.f == src->f);
73
74     dst->tf.f = dst->f;
75     ret = ff_thread_ref_frame(&dst->tf, &src->tf);
76     if (ret < 0)
77         goto fail;
78
79     dst->qscale_table_buf = av_buffer_ref(src->qscale_table_buf);
80     dst->mb_type_buf      = av_buffer_ref(src->mb_type_buf);
81     dst->pps_buf          = av_buffer_ref(src->pps_buf);
82     if (!dst->qscale_table_buf || !dst->mb_type_buf || !dst->pps_buf) {
83         ret = AVERROR(ENOMEM);
84         goto fail;
85     }
86     dst->qscale_table = src->qscale_table;
87     dst->mb_type      = src->mb_type;
88     dst->pps          = src->pps;
89
90     for (i = 0; i < 2; i++) {
91         dst->motion_val_buf[i] = av_buffer_ref(src->motion_val_buf[i]);
92         dst->ref_index_buf[i]  = av_buffer_ref(src->ref_index_buf[i]);
93         if (!dst->motion_val_buf[i] || !dst->ref_index_buf[i]) {
94             ret = AVERROR(ENOMEM);
95             goto fail;
96         }
97         dst->motion_val[i] = src->motion_val[i];
98         dst->ref_index[i]  = src->ref_index[i];
99     }
100
101     if (src->hwaccel_picture_private) {
102         dst->hwaccel_priv_buf = av_buffer_ref(src->hwaccel_priv_buf);
103         if (!dst->hwaccel_priv_buf) {
104             ret = AVERROR(ENOMEM);
105             goto fail;
106         }
107         dst->hwaccel_picture_private = dst->hwaccel_priv_buf->data;
108     }
109
110     for (i = 0; i < 2; i++)
111         dst->field_poc[i] = src->field_poc[i];
112
113     memcpy(dst->ref_poc,   src->ref_poc,   sizeof(src->ref_poc));
114     memcpy(dst->ref_count, src->ref_count, sizeof(src->ref_count));
115
116     dst->poc           = src->poc;
117     dst->frame_num     = src->frame_num;
118     dst->mmco_reset    = src->mmco_reset;
119     dst->long_ref      = src->long_ref;
120     dst->mbaff         = src->mbaff;
121     dst->field_picture = src->field_picture;
122     dst->reference     = src->reference;
123     dst->recovered     = src->recovered;
124     dst->invalid_gap   = src->invalid_gap;
125     dst->sei_recovery_frame_cnt = src->sei_recovery_frame_cnt;
126     dst->mb_width      = src->mb_width;
127     dst->mb_height     = src->mb_height;
128     dst->mb_stride     = src->mb_stride;
129
130     return 0;
131 fail:
132     ff_h264_unref_picture(h, dst);
133     return ret;
134 }
135
136 void ff_h264_set_erpic(ERPicture *dst, H264Picture *src)
137 {
138 #if CONFIG_ERROR_RESILIENCE
139     int i;
140
141     memset(dst, 0, sizeof(*dst));
142
143     if (!src)
144         return;
145
146     dst->f = src->f;
147     dst->tf = &src->tf;
148
149     for (i = 0; i < 2; i++) {
150         dst->motion_val[i] = src->motion_val[i];
151         dst->ref_index[i] = src->ref_index[i];
152     }
153
154     dst->mb_type = src->mb_type;
155     dst->field_picture = src->field_picture;
156 #endif /* CONFIG_ERROR_RESILIENCE */
157 }
158
159 int ff_h264_field_end(H264Context *h, H264SliceContext *sl, int in_setup)
160 {
161     AVCodecContext *const avctx = h->avctx;
162     int err = 0;
163     h->mb_y = 0;
164
165     if (in_setup || !(avctx->active_thread_type & FF_THREAD_FRAME)) {
166         if (!h->droppable) {
167             err = ff_h264_execute_ref_pic_marking(h);
168             h->poc.prev_poc_msb = h->poc.poc_msb;
169             h->poc.prev_poc_lsb = h->poc.poc_lsb;
170         }
171         h->poc.prev_frame_num_offset = h->poc.frame_num_offset;
172         h->poc.prev_frame_num        = h->poc.frame_num;
173     }
174
175     if (avctx->hwaccel) {
176         err = avctx->hwaccel->end_frame(avctx);
177         if (err < 0)
178             av_log(avctx, AV_LOG_ERROR,
179                    "hardware accelerator failed to decode picture\n");
180     }
181
182     if (!in_setup && !h->droppable)
183         ff_thread_report_progress(&h->cur_pic_ptr->tf, INT_MAX,
184                                   h->picture_structure == PICT_BOTTOM_FIELD);
185     emms_c();
186
187     h->current_slice = 0;
188
189     return err;
190 }